Patent US3143735A successfully refreshed from Google Patents.
US3143735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Height computer
Assignee: Individual
•
Filing: 1957-04-23
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Granted: 1964-08-04
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Expires: 1977-04-23
Abstract
No abstract record available.
Inventors
- 👤 George E Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:06
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A DEVICE FOR DETERMINING THE HEIGHT OF A TARGET COMPRISING: A PLURALITY OF RECEIVERS HAVING ANTENNAS CONNECTED THERETO, WITH THE MAIN LOBES OF SAID ANTENNAS BEING FANNED OUT AND DIRECTED AT DIFFERENT ANGLES IN A VERTICAL PLANE, A DETECTOR CONNECTED TO EACH OF SAID RECEIVERS, A PENTAGRID CONVERTER TUBE HAVING A CATHODE, AN ANODE, A SCREEN GRID, A SUPRESSOR GRID, A FIRST AND A SECOND CONTROL GRID IN EACH OF SAID DETECTORS WITH THE RECEIVER OUTPUT BEING CONNECTED TO THE FIRST CONTROL GRID, MEANS FOR PRODUCING A VOLTAGE PROPORTIONAL TO RADAR RANGE, MEANS FOR PRODUCING AN EARTH''S CURVATURE CORRECTION VOLTAGE, MEANS FOR APPLYING SAID RANGE VOLTAGE AND SAID EARTH''S CURVATURE CORRECTION VOLTAGE TO SAID SECOND CONTROL GRID, A CONSTANT CURRENT SOURCE CONNECTED TO THE CATHODE OF ALL OF SAID CONVERTER TUBES, MEANS FOR CONVERTING THE OUTPUT OF SAID
Claim 2
Independent Claim
138 words
A DEVICE FOR DETERMINING THE HEIGHT OF A TARGET COMPRISING: A PLURALITY OF RECEIVERS HAVING ANTENNAS CONNECTED THERETO, WITH THE MAIN LOBES OF SAID ANTENNAS BEING FANNED OUT AND DIRECTED AT DIFFERENT ANGLES IN A VERTICAL PLANE, A DETECTOR CONNECTED TO EACH OF SAID RECEIVERS, A PENTAGRID CONVERTER TUBE HAVING A CATHODE, AN ANODE, A SCREEN GRID, A SUPRESSOR GRID, A FIRST AND A SECOND CONTROL GRID IN EACH OF SAID DETECTORS WITH THE RECEIVER OUTPUT BEING CONNECTED TO THE FIRST CONTROL GRID, MEANS FOR PRODUCING A VOLTAGE PROPORTIONAL TO RADAR RANGE, MEANS FOR PRODUCING AN EARTH''S CURVATURE CORRECTION VOLTAGE, MEANS FOR APPLYING SAID RANGE VOLTAGE AND SAID EARTH''S CURVATURE CORRECTION VOLTAGE TO SAID SECOND CONTROL GRID, A CONSTANT CURRENT SOURCE CONNECTED TO THE CATHODE OF ALL OF SAID CONVERTER TUBES, MEANS FOR CONVERTING THE OUTPUT OF SAID
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |